Well I got it all hooked up, the Z-2300 is running from the rear input and the klipsch are running from the front, and WOW.
First of all, the bass coming from these two subs combined is overwhelming. It sounds incredible and I'm pretty sure it could knock my house down. Second, the klipsch satellites are MUCH better than the z-2300's in my opinion. The tweeter makes a huge difference, the mids and highs are worlds better. And lastly, the klipsch sub is way cleaner than the 2300 sub, much tighter and better bass (even though it may be a little less powerful, but I can make up for that when I need it with the z-2300).
So all in all, this setup is PERFECT for me, I can get bone shaking bass when I need it for parties and such, and the klipsch satellites allow for a little more critical listening than the 2300's did.
Thanks for the help!